Monero Blockchain at 3 GB is the second largest Blockchain besides Bitcoin, if it had the same amount of volume, the size would grow at 1-2 GB a month.
Bitcoin is growing at >2 GB per month so if Monero had the same volume it would grow faster, but only by a small factor (maybe 2-3). Apparently, though, you think 1-2 GB per month is unacceptable so Bitcoin must be a failure in your view.
Dash, that you guys spend some time and figure out how to make the Blockchain permanently under 100 MB via pruning
Pruning does not reduce the size of the blockchain, only the amount that needs to be stored, unless you throw away information needed to verify it that the blockchain is actually valid. Similar storage optimizations can be done with Monero as well.
and Proof of Stake
So let me get this straight. The 1st, 2nd, 3rd, and 4th largest coins are all PoW (I'm not counting ripple since I don't really consider it a cryptocurrency, but in any case it isn't PoS), yet somehow you've decided you know better than the market and we all need to switch to PoS. Wonderful.